Filter for a cigarette or joint

ABSTRACT

A filter has a conical outer wall of which the end having the smaller diameter forms a mouthpiece and the other end a suction piece. Within the outer wall there is an inner wall which also has a conical shape and whose end having the larger diameter is connected to the mouthpiece while the other end is present near the suction piece. The conical shape of the inner wall provides that the current of air is optimised.

FIELD OF THE INVENTION

The invention relates to a filter for a cigarette or joint, comprisingan outer wall of which one end forms a mouthpiece and the other end asuction piece provided with suction openings and within which at leastone inner wall is present, which inner wall has a conical shape and witha first end having the larger diameter is connected to the mouthpieceand with the other, second end having the smaller diameter is presentnear the suction piece, which suction piece comprises a cover grid whosemiddle section is closed and is present distal from the second end ofthe inner wall, with a receiving reservoir being present between theinner wall and the outer wall.

The filter is introduced in that part of the cigarette or joint that isput to the mouth and is to prevent particles of tobacco or weed cominginto the mouth or throat. As a result of the conical inner wall there isless need to suck the filter hard, so that the cigarette or joint issmoked more easily and inhalation can take place in a better and simplerway. As a result, the smoking of a cigarette or joint rolled with thefilter is more enjoyable to the user.

STATE OF THE ART

A filter of this type is known from U.S. Pat. No. 2,520,307. This knownfilter is affixed to a cigarette or joint in lieu of rolled therein. Inthe known filter a partition is present between the suction openings andthe opening at the second end of the inner wall, as a result of whichthe suction openings are connected to the opening at the second end ofthe inner wall via an elongated channel. During use tar that is presentin the sucked-in smoke is deposited against the side walls of thechannel and particles of tobacco and weed are received in the receivingreservoir. In this way not only particles of tobacco and weed areremoved from the smoke, but the tar as well, so that the taste andeffect of the smoke is diminished.

From U.S. Pat. No. 2,045,601 is known a filter that is to be put overthe mouthpiece of a cigarette or joint. The inner wall is inserted intothe tobacco or weed. In front of the opening at the second end of theinner wall there is no closed section so that tiny particles of tobaccoor weed can be sucked in directly through this opening.

From GB 1910 04383 is known a filter that is obtained by rolling up apiece of carton. The cigarette paper is rolled around the mixture oftobacco and weed and the filter is affixed to the end. This filterprovides that the complete joint can be smoked to the end without oneburning one's lips. Furthermore, the filter stops tiny tobacco and weedparticles coming through.

SUMMARY OF THE INVENTION

It is an object of the invention to provide a filter of the type definedin the opening paragraph with which the smoke retains more its taste andstrength than with the known filter, whereas yet the particles oftobacco and weed are removed from the smoke. For this purpose the filteraccording to the invention is characterized in that the opening betweenthe second end of the inner wall and the suction piece is connected instraight or substantially straight lines to the suction openings in thesuction piece. There is no partition present between the opening in theinner wall and the suction openings, so that these openings are directlyconnected to each other. The result of this is that the smoke retainsthe tar, whereas yet small particles of tobacco and weed contained inthe smoke are removed from the smoke. An embodiment of the filteraccording to the invention is characterized in that the outer wall alsohas a conical shape with the mouthpiece having the smaller diameter andthe suction piece having the larger diameter.

For a still further improvement of the current of air, a furtherembodiment of the filter according to the invention is characterized inthat between the second end of the inner wall and the middle section ofthe cover grid there is a partition which is provided with holes formingthe opening mentioned above.

BRIEF DESCRIPTION OF THE DRAWINGS

The following description relating to the appended drawings, the wholegiven by way of non-limiting example of the filter according to theinvention, will provide better understanding of how the invention can berealized, in which:

FIG. 1 shows a longitudinal section of a first embodiment of the filter;

FIG. 2 shows a perspective view of the filter shown in FIG. 1;

FIG. 3 shows the filter shown in FIG. 1 seen on the cover grid; and

FIG. 4 shows a longitudinal section of a second embodiment of thefilter.

DETAILED DESCRIPTION OF THE DRAWINGS

FIGS. 1, 2 and 3 show a first embodiment of the filter according to theinvention represented in longitudinal section, in a perspective view andin side elevation, respectively. The filter 1 has a conical outer wall 3of which the end having the smaller diameter forms a mouthpiece 5 andthe end having the larger diameter forms a suction piece 7. Within theouter wall 3 there is an inner wall 9 which also has a conical shape.From this inner wall 9 a first end 11, having the larger diameter, isconnected to the mouthpiece 5 while the other, second end 13, having thesmaller diameter, is present near the suction piece 7. As a result ofthe conical shape of the inner wall 9 the current of air is optimised sothat one needs to draw less hard on the filter. The suction piece 7 hasa cover grid 15 of which the middle section 17 is closed and is presentdistal from the second end 13 of the inner wall 9. Between the innerwall 9 and the outer wall 3 there is a receiving reservoir 19 where theredundant particles of tobacco/weed/dust 21 end up in. There is anopening 23 between the second end 13 of the inner wall and the middlesection 17 of the cover grid. Thanks to the cover grid 15 and thereceiving reservoir 19 it is impossible to have small particles oftobacco/weed/dust ending up in one's mouth or throat. The opening 23 isin direct connection with the suction openings 27 in the suction piece 7where the smoke can flow in straight lines 25 from the openings 23 tosuction openings 27.

FIG. 4 shows a second embodiment of the filter according to theinvention. In this filter 31 a partition 33 provided with holes 35 ispresent between the second end 13 of the inner wall 9 and the middlesection 17 of the cover grid 15.

Albeit in the foregoing disclosure the invention has been explained withreference to the drawing figures, it should be pointed out that theinvention is by no means restricted to the embodiments shown in thedrawing figures. The invention also pertains to all embodimentsdeviating from the embodiments shown in the drawing figures within thespirit and scope defined by the claims.

1. A filter for a cigarette or joint, comprising: an outer wall of whichone end forms a mouthpiece and an other end a suction piece providedwith suction openings and within which at least one inner wall ispresent, which inner wall has a conical shape and with a first endhaving a larger diameter is connected to the mouthpiece and with asecond end having a smaller diameter is present near the suction piece,which suction piece comprises a cover grid with a middle section that isclosed and is present distal from the second end of the inner wall, witha receiving reservoir being present between the inner wall and the outerwall, characterized in that an opening between the second end of theinner wall and the suction piece is connected in straight orsubstantially straight lines to the suction openings in the suctionpiece.
 2. A filter as claimed in claim 1, characterized in that theouter wall also has a conical shape with the mouthpiece having thesmaller diameter and the suction piece having the larger diameter.
 3. Afilter as claimed in claim 1, characterized in that between the secondend of the inner wall and the middle section of the cover grid there isa partition which is provided with holes forming the opening.
 4. Afilter for a cigarette or joint, the filter comprising: an outer wall ofwhich one end forms a mouthpiece and the other end a suction piece; atleast one inner wall having a first end with a larger diameter that isconnected to the mouthpiece, and a second end having a smaller diameterthat extends to near the suction piece; a cover grid that covers thesuction piece, the cover grid having suction openings disposed around amiddle section that is closed; and a receiving reservoir formed betweenthe inner wall and the outer wall, characterized in that an opening tothe receiving reservoir is formed by the second end of the inner walland the suction piece, and the opening to the receiving reservoir isconnected in straight or substantially straight lines to the suctionopenings in the suction piece.
 4. A filter for a cigarette or joint, thefilter comprising: an outer wall of which one end forms a mouthpiece andthe other end a suction piece; an inner wall having a first end with alarger diameter that is connected to the mouthpiece, and a second endhaving a smaller diameter that extends to near the suction piece; acover grid that covers the suction piece, the cover grid having suctionopenings disposed around a middle section that is closed; and areceiving reservoir formed between the inner wall and the outer wall,and wherein there are substantially no obstructions between the suctionopenings in the suction piece and the second end of the inner wall.